<template>
	<view class="cart_box" v-if="buffer">
		<view class="cart_head">
			<view class="cart_menu">
				<text>全部(20)</text>
				<text>降价(4)</text>
				<text>常卖(2)</text>
				<text>分类</text>
			</view>
			<view class="cart_ticket">
				<!-- 此处使用checkbox是因为支付宝switch没有checkbox类型 -->
				<!-- <switch type="checkbox" :checked="true" color="#ff6040"  /> -->
				<checkbox color="#FF6040" value="true" />
				<text class="cart_ticket_text1">小U自营</text>
				<text class="cart_ticket_text2">以免运费 |</text>
				<text class="cart_ticket_text3">领券</text>
			</view>
		</view>

		<view class="container">
			<view class="top">
				<scroll-view class="scroll-view_H" scroll-x="true" scroll-left="0" v-for="(item,index) in cartList"
					:key="item.id">
					<view class="cartInfo" id="demo1">
						<!-- 明日来写购物车基本信息 -->
						<view class="cartInfochild">
							<!-- 选择框 -->
							<view class="cartInfo_switch common">
								<!-- 点击当前商品 -->
								<checkbox-group>
									<checkbox color="#FF6040" :checked="item.status" value="1"
										@click="changeOne(index)" />
								</checkbox-group>

								<!-- <switch type="checkbox" :checked="true"  color="#ff6040" /> -->
							</view>
							<!-- 图片 -->
							<view class="cartInfo_image common">
								<image :src="item.src" mode="widthFix"></image>
							</view>

							<!-- 信息 -->
							<view class="cartInfo_info">
								<label style="font-size: 32rpx;">{{item.goodsname}}</label>
								<label style="font-size: 24rpx; color: #ccc;">规格：不错的商品</label>
								<label style="font-size: 20rpx; color: #FF6040;">比加入降低￥100</label>
								<label style="color:#FF6040;">￥
									<text style="font-size: 40rpx;color:#FF6040;">200
									</text> <text>￥200</text>
								</label>
							</view>
							<!-- 加减数量 -->
							<view class="cartInfo_num">
								<view class="cartInfo_num_child">
									<label>－</label>
									<label>1</label>
									<label>＋</label>
								</view>
							</view>
						</view>

					</view>
					<view class="cartDel" id="demo2" @click="cartDelete(index,item.id)">
						<label for="">删除</label>
					</view>
				</scroll-view>
			</view>

			<!-- 底部 -->
			<view class="foot">
				<view class="footd1">
					<checkbox-group @change="changeAll">
						<checkbox color="#FF6040" value="1" :checked="allStatus" />
					</checkbox-group>
					<!-- <switch type="checkbox" :checked="true" color="#ff6040" /> -->
					<label>全选</label>
				</view>
				<view class="footd2">
					<view class="footd2sp1">合计:<label style="color: #FF6040;">￥ {{jisuan.countMoney}}</label></view>
					<label class="footd2sp2">不含运费，已优惠￥0.00</label>
				</view>
				<!-- 跳到提交订单，结算页面 -->
				<view class="footd3" hover-class="touchOpacity" @click="goOrderConfirm">
					<!-- 被选中的商品的个数 -->
					<label>去结算({{jisuan.countNumber}}件)</label>
				</view>
			</view>

		</view>
	</view>
	<!-- 无数据提示 -->
	<view v-else>
		<cartnull />
	</view>
</template>

<script>
	// 引入数据为空提示组件
	import cartnull from '@/components/cartnull/cartnull.vue';
	export default {
		components: {
			cartnull
		},
		data() {
			return {
				cartList: [], //初始化购物车数据
				buffer: true, //检测购物车是否有数据
				allStatus: true, //全选状态

			}
		},
		onLoad() {},
		// 页面显示时
		// 使用计算属性
		computed: {
			jisuan() {
				let countMoney = 0;
				let countNumber = 0;
				// 遍历所有的购物车数据 计算状态是true的
				this.cartList.forEach(item => {
					if (item.status) {
						countMoney += parseInt(item.num) * parseFloat(item.price)
						countNumber += parseInt(item.num)
					}
				})

				// 返回支付金额 购买的商品数量
				return {
					countMoney,
					countNumber
				}
		}
			},
		
		methods: {
			//删除购物车数据
			cartDelete(index, id) {
				//1.询问是否删除
				uni.showModal({
					title: "温馨提示",
					content: "删除后不可恢复！",
					success: res => {
						//2.删除页面节点
						if (res.confirm) {
							this.cartList.slice(index, 1)
							//3.同步数据
							this.$http({
									url: "cartdelete",
									method: "post",
									data: {
										id
									}
								})
								.then(res => {
									// 4.检测是否还有数据没有就提示为空
									if (this.cartList.length == 0) this.buffer = false
								}).catch(err => console.log(err))
						}
					}
				})
			},
			//全选操作
			changeAll() {
				//同步自身状态
				this.allStatus = !this.allStatus
				//同步所有购物车数据状态
				this.cartList.forEach(item => item.status = this.allStatus)
			},
			//单选状态
			changeOne(index) {
				this.cartList[index].status = !this.cartList[index].status

			},
			//获取购物车数据
			getCartList(uid) {
				this.$http({
						url: "cartlist",
						data: {
							uid
						}
					})
					.then(res => {
						console.log(res)
						if (res.list == null) {
							this.buffer = false
						} else {
							this.buffer = true
							//接受传递数据
							let cartData = res.list;
							cartData.forEach(item => {
								item.status = true; //重置购物车商品状态为bool
								item.img = this.$URL + item.img
							})
							//展示给页面
							this.cartList = cartData;
						}
					})
					.catch(err => console.log(err))
			}
		}
	}
</script>

<style scoped>
	/* 引入样式文件 */
	@import url("@/static/css/cart.css");
</style>
